Finding the Fourth Proportional to 2,570.88, 3,855.72 and 722.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,570.88 : 3,855.72 = 722.18 : x
2. Step 2: Convert to fraction form
   2,570.88/3,855.72 = 722.18/x
3. Step 3: Cross multiply
   2,570.88x = 3,855.72 × 722.18
4. Step 4: Simplify right side
   2,570.88x = 2,784,507.30
5. Step 5: Solve for x
   x = 2,784,507.30/2,570.88
6. Step 6: Final answer
   x = 1,083.09